Investigation of Structure and Magnetic Properties of Rare Earth-Leaned Pr2(Fe, Co)14(C, B)-Type Nanocomposites

摘要: Abstract The phase evolution and magnetic properties of Pr x Fe 82-x-y Ti y Co 10 B 4 C (x=9–10.5; y=0, 2) melt-spun ribbons have been investigated. effects wheel speed annealing on the crystallization were emphatically discussed. It was found that substitution enhances glass forming ability 2 (Fe,Co) 14 (C,B)-type ribbons. For high V s (18 m/s), Ti-substitution consist significant amorphous phase, show a typical two-step behavior, while most Ti-free are mainly composed crystallized 2:14:1, α-(Fe, Co) 2:17 phases. With decrease in speed, all these composition crystallized, more magnetically hard 2:14:1 is formed content metastable decreases with increasing substitution. A r 9.5 kG, i H c 9.8 kOe, ( BH ) max 16.0 MGOe obtained as-spun 10.5 69.5 C4 ribbon prepared at =15 m/s. different , lower than owing to poor demagnetization-curve shape. also helps suppressing grain growth during process, simultaneously, gently promoting phase. Annealing treatment significantly improves higher content. No obvious promotion after annealing.